SWG20 refers to a specific wire gauge standard called the Standard Wire Gauge. It is a system used to measure the diameter of wires. In SWG, the gauge number decreases as the wire diameter increases. Therefore, SWG20 corresponds to a smaller wire diameter compared to SWG18 or SWG16.

For the case of SWG20 wire, the diameter is approximately 0.914mm. This means that the aluminum wire has a diameter of 0.914mm or around 0.036 inches.

Aluminum winding wire with a diameter of 0.914mm (or SWG20) can be used in various applications, such as motors, transformers, solenoids, and other electromagnetic devices. The specific application and the electrical requirements would determine whether this size of aluminum wire is suitable for a given project.

Standard Wire Gauge to Inches and Millimetres
1 Swg = 0.300” / 7.620mm	16 Swg = 0.064” / 1.626mm
2 Swg = 0.276” / 7.010mm	17 Swg = 0.056” / 1.422mm
3 Swg = 0.252” / 6.401mm	18 Swg = 0.048” / 1.219mm
4 Swg = 0.232” / 5.893mm	19 Swg = 0.040” / 1.016mm
5 Swg = 0.212” / 5.385mm	20 Swg = 0.036” / 0.914mm
6 Swg = 0.192” / 4.877mm	21 Swg = 0.032” / 0.813mm
7 Swg = 0.176” / 4.470mm	22 Swg = 0.028” / 0.711mm
8 Swg = 0.160” / 4.064mm	23 Swg = 0.024” / 0.610mm
9 Swg = 0.144” / 3.658mm	24 Swg = 0.022” / 0.559mm
10 Swg = 0.128” / 3.251mm	25 Swg = 0.020” / 0.508mm
11 Swg = 0.116” / 2.946mm	26 Swg = 0.018” / 0.457mm
12 Swg = 0.104” / 2.642mm	27 Swg = 0.0164” / 0.417mm
13 Swg = 0.092” / 2.337mm	28 Swg = 0.0148” / 0.376mm
14 Swg = 0.080” / 2.032mm	29 Swg = 0.0136” / 0.345mm
15 Swg = 0.072” / 1.829mm<	30 Swg = 0.0124” / 0.315mm

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